Write a function that takes two single digit numbers as a string and returns the sum as an int. If the number of digits from one of the arguments is more than one, return 0.
Write a function that takes two single digit numbers as a string and returns the sum as an int. The strings can only contain one digit which will be a positive or negative number from 0 to 9. Otherwise, you must return 0.
### Expected function
@ -19,15 +19,12 @@ Here is a possible program to test your function :